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<head>
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    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        ul li{
            list-style: none;
            width: 300px;
            height: 100px;
            background: crimson;
            float: left;
            margin: 20px;
        }
    </style>
</head>
<body>
<ul>
    <li>1</li>
    <li>2</li>
    <li>3</li>
</ul>
<ul>
    <li>1</li>
    <li>2</li>
    <li>3</li>
</ul>
<ul>
    <li>1</li>
    <li>2</li>
    <li>3</li>
</ul>
<ul>
    <li>1</li>
    <li>2</li>
    <li>3</li>
</ul>
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<script src="js/jquery.nav.js"></script>
<script src="js/jquery.tab.js"></script>
<script>
$(function(){
    //全局
    //$.nav();
    //局部
    $("ul").eq(0).nav();
})
</script>
</body>
</html>